in the gas-phase reaction A + B --> C + 2D, it was found that when 2 mole A, 1 mole B, and 3 mole D were mixed and allowed to come to equilibrium at 25^oC, the resulting mixture contained 0.79 mole C at a total pressure of 1 bar. calculate (a) the mole fractions of each species at equilibrium, (b) K_x (c) K and (d) delta_rG^o

Consider the titration of 30.0 mL of 0.030 M NH₃ with 0.025 M HCl. Calculate the pH after the following volumes of titrant have been added.

(a) 35.0 mL

(b) 36.0 mL

(c) 37.0 mL

Calculate the cell emf for the following reaction at 25°C: 2Ag+(0.010 M) + H2(1 atm) ? 2Ag(s) + 2H+(pH = 8.00)

My compound is 2,4-Dimethyl-1-Pentanol

1.       Retrosynthetic analysis of your compound: What is a possible precursor?   What are the reagents you need to obtain your product when using this precursor?     

2.       In a drawing, show the synthetic steps that lead from the precursor to your compound. Use curved arrows properly!

3.       Using your precursor, show mechanisms and products of a Markovnikov and an anti-Markovnikov addition.

4.       Using the materials obtained through Markovnikov and anti-Markovnikov additions to the precursor, discuss stereochemical aspects. That means: Enantiomers? Diastereomers? Regioisomers? E. g., Markovnikov addition yields the (?)-enantiomer, while …   . Are the compounds chiral or achiral, why is that?

          Indicate the proper orientation of substituents by drawing structures with wedges and dashes where necessary.

5.         Identify all chiral centers in your substance and assign R- or S- designations.        

True or False

1.For the following reaction at equilibrium:
                       CaCO₃(s) ⇌ CaO(s) + CO₂(g)
                       increasing the total pressure by adding Ar(g) will shift the equilibrium to the left.

2.For the following reaction at equilibrium:
                       H₂(g) + F₂(g) ⇌ 2HF(g)
                       removing H₂ will increase the amount of F₂ present once equilibrium is reestablished.

3.Increasing the temperature of an exothermic reaction shifts the equilibrium position to the right.

4.For the following reaction at equilibrium:
                       CaCO₃(s) ⇌ CaO(s) + CO₂(g)
                       adding more CaCO₃ will shift the equilibrium to the left.

5. For the following reaction at equilibrium:
                       2 H₂(g) + O₂(g)⇌ 2 H₂O(g)
                       the equilibrium will shift to the left if the volume is halved.

10.5 mL of 0.100M ammonium chloride aqueous solution is titrated with 0.100 M NaOH(aq).

What type of solution is present when V_NaOH = 2.00 mL?

Select one:

a. strong acid

b. strong base

c. weak acid

d. weak base

e. buffered

Reorganize the following list of cations in the order of strongest to the weakest potential for hydrolysis

Ca2+, Ba2+, Cs+, Li+, Cr3+, Fe3+, Pb4+, Na+, K+, Mg2+

Thanks!!

Calculate the EMF of the cell:

Al(s) | Al3+ (0.02 M) || Au+ (0.01 M) | Au(s)

Where Al3+ + 3e-  Al E o= -1.66 V

Where Au+ + e-  Au E o = +0.99 V

What mass of sucrose (C12H22O11) should be combined with 461g of water to make a solution with an osmotic pressure of 8.20atm at 305K ? (Assume the density of the solution to be equal to the density of the solvent.)

Caproic acid is composed of C, H, and O atoms. Combusting a 0.450 gram sample of the compound in air produces 1.024 grams CO2 and 0.418 grams H2O. The molecular weight of caproic acid is 116 grams/mol. How can we find the molecular formula for caproic acid? Please show all work

How can you ensure a quantitative transfer of your product during transfer steps? What would be the expected frequency range (in cm-1) of the C=O stretch in 2,4-pentanedoine? Based on the structural differences, what changes would you expect to see in the spectrum of the product?

When 100 mL of an aqueous solution containing 1.0 g of caffeine is extracted with 10 mL of chloroform at room temperature, 0.5 g of caffeine is transferred to the chloroform layer. Calculate the distribution coefficient of caffeine between chloroform and water at room temperature.

The picture below shows two bulbs connected by a stopcock. The 6.00-L bulb contains nitric oxide at a pressure of 0.400 atm, and the 1.50-L bulb contains oxygen at a pressure of 2.50 atm. After the stopcock is opened, the gases mix and react: Determine which gases remain after the reaction goes to completion and calculate their partial pressures. The temperature at the beginnning and the end of the experiment is 22 °C. Which gases are present at the end of the experiment? What are the partial pressures of the gases? If the gas was consumed completely, put 0 for the answer.